Alarm wont allow car to start

Have a 2000 Sebring Convertible. Car has no key faab, but an alarm will go off and car will not start, replaced, the ECM and the instrument cluster with no results of correcting the problem What other possible causes are there ?

Are you sayiing that your car has a key with no plastic from the factory like that?
and you changing the ECM it won't start you need to have an ECM matched to the vehicles VIN or it cannot start. The dealer is the only one who can program and upload the information.
contact me at fixincars@yahoo.com

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try to reach up under the front of the car with your arm and try to locate the latch with the hood release cable attached to it. Use your fingers or plyers to manipulate the latch to release-pull on the cable. You may have to remove the grill to access it.

Just a quick note once you hook the battery back up try locking it and unlocking it from the drivers door, if that fails you might try the passenger door. I know on some chrysler products you have to lock and lock again to arm and unlock to disarm. I hope this helps.Thanks,Joey

You need to disarm the alarm, the 2 problems are related, the start and stall is caused by the fuel pump interupt function of the factory alarm, you triggered it when you replaced the battery, The reset procedure is in the owners manual.

ifoyu lock all of the doors with the keys and then go around and unlock them with the keys and open and shut the trunk again with the keys it should reset the alarm good luck please let me know if it works for you it did for me